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84LX89GT · 03-18-2003, 02:47 AM

You could buy or borrow/rent a fuel pressure gauge and hook it up to the schrader valve on the fuel rail and read fuel pressure. I believe for your vehicle (if i were to guess) you should have 35-40 psi of fuel pressure with the key on.
Also pull the plugs and see what they look like, if they're glazed and white then your vehicle is running lean, if they're covered in gas....it's rich.
Also on heavy acceleration is there any black smoke coming from the tail pipe. The catalytic converter may hide it running rich because alot will burn in the catalyst. You could also look underneath your car and see what your catalytic converter looks like. If it's glowing red it's running way too rich.
Hope this helps

03-18-2003, 02:47 AM	#2
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	You could buy or borrow/rent a fuel pressure gauge and hook it up to the schrader valve on the fuel rail and read fuel pressure. I believe for your vehicle (if i were to guess) you should have 35-40 psi of fuel pressure with the key on. Also pull the plugs and see what they look like, if they're glazed and white then your vehicle is running lean, if they're covered in gas....it's rich. Also on heavy acceleration is there any black smoke coming from the tail pipe. The catalytic converter may hide it running rich because alot will burn in the catalyst. You could also look underneath your car and see what your catalytic converter looks like. If it's glowing red it's running way too rich. Hope this helps __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)